It sure looks fake, her playing with the gun just before the firecrackers, but seeing her jump and run is pretty funny.

I was eating dinner a long time ago, had a stalking, psycho girlfriend I was trying to get rid of, my friend thought it would be funny to open my door and throw some firecrackers in towards me. I was ducking and running like that wife in this video, I thought for sure the psycho was shooting at me! I can laugh about it now....